Vulnerability · Published Sep 16, 2026 · Assigned by GitHub_M

CVE-2026-88976@platejs/core HTML deserialization can trigger browser behavior during parsing

Medium 6.1

In plain English

A medium-severity cross-site scripting in plate from udecode. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 72.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Plate is a rich-text editor with AI and shadcn/ui. Prior to 53.3.11, and in the discontinued 54.0.0-beta.0 through 54.0.0-beta.1 builds, Plate core HTML deserialization APIs parse supplied HTML strings in the active document. When an application passes untrusted or cross-user HTML to these APIs, certain HTML attributes can trigger browser behavior before the HTML is converted into editor nodes. This can allow attacker-controlled script to execute in the consuming application's origin when another user loads the deserialized content. This issue is fixed in version 53.3.11.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@platejs/core	53.3.11	GHSA-qrfj-mgw8-j9c6
npm	@platejs/core	no fix listed	GHSA-qrfj-mgw8-j9c6

Affected products (as reported)

Vendor	Product	Versions
udecode	plate	< 53.3.11>= 54.0.0-beta.0, <= 54.0.0-beta.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/udecode/plate/security/advisories/GHSA-qrfj-mgw8-j9c6 x_refsource_CONFIRM
https://github.com/udecode/plate/pull/5117 x_refsource_MISC
https://github.com/udecode/plate/commit/d02afe45d5ec3a9fb95e0745bc5820ff18a3c12b x_refsource_MISC
https://github.com/udecode/plate/releases/tag/v53.3.11 x_refsource_MISC